Disable shadows per light, per fragment?

[SpiderPig]

Would it be possible disable shadows for a single light in the fragment shader, with some shader manipulation?

[Josh]

I guess if you sent the light's ID to a uniform declared in the lighting file, and modified the lighting code to skip that light, but it seems difficult. Why would you want to do this? You can disable shadows on a per-light basis already.

[SpiderPig]

It was thought for real-time recasting of terrain shadows.  Currently I disable all lighting for where there are shadows from the directional light.  But I'd like to disable the light only for the specific light source so I can get multiple shadows from multiple lights.  This way a point light could light up an area that is in shadow for a directional light.

[SpiderPig]

Is this the correct way to get the lights index?

auto light = CreateDirectionalLight(world);
light->GetIndex();

And would I compare that value to lightIndex here in PBR/Lighting.glsl?

lightIndex = ReadLightGridValue(uint(lightlistpos));